package com.gh.reggie.config;

import com.fasterxml.jackson.databind.ObjectMapper;
import com.gh.reggie.common.JacksonObjectMapper;
import lombok.extern.slf4j.Slf4j;
import org.springframework.context.annotation.Configuration;
import org.springframework.http.converter.HttpMessageConverter;
import org.springframework.http.converter.cbor.MappingJackson2CborHttpMessageConverter;
import org.springframework.http.converter.json.MappingJackson2HttpMessageConverter;
import org.springframework.web.servlet.config.annotation.ResourceHandlerRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurationSupport;

import java.util.List;

@Slf4j
@Configuration
public class WebMvcConfig extends WebMvcConfigurationSupport {

    /**
     * 静态资源映射
     * @param registry
     */
    @Override
    protected void addResourceHandlers(ResourceHandlerRegistry registry) {
        log.info("开始进行静态资源映射");
        registry.addResourceHandler("/backend/**").addResourceLocations("classpath:/backend/");
        registry.addResourceHandler("/front/**").addResourceLocations("classpath:/front/");
    }

    /**
     * 扩展MVC消息框架的消息转换器（处理根据id更新数据时js处理long类型数据精度丢失问题）
     * @param converters the list of configured converters to extend
     */
    @Override
    protected void extendMessageConverters(List<HttpMessageConverter<?>> converters) {
        log.info("拓展消息转换器....");
        //创建消息转换器对象
        /*MappingJackson2CborHttpMessageConverter messageConverter = new MappingJackson2CborHttpMessageConverter();*/
        MappingJackson2HttpMessageConverter messageConverter = new MappingJackson2HttpMessageConverter();
        //设置对象转换器，底层使用Jackson将json转化为json
        messageConverter.setObjectMapper(new JacksonObjectMapper());
        //将上面的的转化器对象追加到mvc消息转换器的集合中；
        converters.add(0,messageConverter);

    }

}
